﻿<soap:Envelope
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
 xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
  <soap:Body>
    <UpdateItem xmlns="http://schemas.microsoft.com/exchange/services/2006/messages"
                ConflictResolution="AlwaysOverwrite">
      <ItemChanges>
        <t:ItemChange>
          <t:ItemId Id="AAAtAA=" ChangeKey="EQAAABYi" />
          <t:Updates>
            <t:SetItemField>
              <t:IndexedFieldURI FieldURI="contacts:EmailAddress" FieldIndex="EmailAddress1"/>
              <t:Contact>
                <t:EmailAddresses>
                  <t:Entry Key="EmailAddress1">changedemail@example.com</t:Entry>
                </t:EmailAddresses>
              </t:Contact>
            </t:SetItemField>
          </t:Updates>
        </t:ItemChange>
      </ItemChanges>
    </UpdateItem>
  </soap:Body>
</soap:Envelope>